ALTER EXTENSION changes the definition of an installed extension. There are several subforms:

ALTER EXTENSION changes the definition of an installed extension. There are several subforms:

−

UPDATE

+

;UPDATE

−

This form updates the extension to a newer version. The extension must supply a suitable update script (or series of scripts) that can modify the currently-installed version into the requested version.

+

:This form updates the extension to a newer version. The extension must supply a suitable update script (or series of scripts) that can modify the currently-installed version into the requested version.

−

SET SCHEMA

+

;SET SCHEMA

−

This form moves the extension's objects into another schema. The extension has to be relocatable for this command to succeed.

+

:This form moves the extension's objects into another schema. The extension has to be relocatable for this command to succeed.

−

ADD member_object

+

;ADD member_object

−

This form adds an existing object to the extension. This is mainly useful in extension update scripts. The object will subsequently be treated as a member of the extension; notably, it can only be dropped by dropping the extension.

+

:This form adds an existing object to the extension. This is mainly useful in extension update scripts. The object will subsequently be treated as a member of the extension; notably, it can only be dropped by dropping the extension.

−

DROP member_object

+

;DROP member_object

−

This form removes a member object from the extension. This is mainly useful in extension update scripts. The object is not dropped, only disassociated from the extension.

+

:This form removes a member object from the extension. This is mainly useful in extension update scripts. The object is not dropped, only disassociated from the extension.

See Section 35.15 for more information about these operations.

See Section 35.15 for more information about these operations.

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=====参数=====

=====参数=====

−

extension_name

+

;extension_name

−

The name of an installed extension.

+

:The name of an installed extension.

−

new_version

+

;new_version

−

The desired new version of the extension. This can be written as either an identifier or a string literal. If not specified, ALTER EXTENSION UPDATE attempts to update to whatever is shown as the default version in the extension's control file.

+

:The desired new version of the extension. This can be written as either an identifier or a string literal. If not specified, ALTER EXTENSION UPDATE attempts to update to whatever is shown as the default version in the extension's control file.

−

new_schema

+

;new_schema

−

The new schema for the extension.

+

:The new schema for the extension.

−

object_name

+

;object_name

−

agg_name

+

;agg_name

−

function_name

+

;function_name

−

operator_name

+

;operator_name

−

The name of an object to be added to or removed from the extension. Names of tables, aggregates, domains, foreign tables, functions, operators, operator classes, operator families, sequences, text search objects, types, and views can be schema-qualified.

+

:The name of an object to be added to or removed from the extension. Names of tables, aggregates, domains, foreign tables, functions, operators, operator classes, operator families, sequences, text search objects, types, and views can be schema-qualified.

−

agg_type

+

;agg_type

−

An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write * in place of the list of input data types.

+

:An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write * in place of the list of input data types.

−

source_type

+

;source_type

−

The name of the source data type of the cast.

+

:The name of the source data type of the cast.

−

target_type

+

;target_type

−

The name of the target data type of the cast.

+

:The name of the target data type of the cast.

−

argmode

+

;argmode

−

The mode of a function argument: IN, OUT, INOUT, or VARIADIC. If omitted, the default is IN. Note that ALTER EXTENSION does not actually pay any attention to OUT arguments, since only the input arguments are needed to determine the function's identity. So it is sufficient to list the IN, INOUT, and VARIADIC arguments.

+

:The mode of a function argument: IN, OUT, INOUT, or VARIADIC. If omitted, the default is IN. Note that ALTER EXTENSION does not actually pay any attention to OUT arguments, since only the input arguments are needed to determine the function's identity. So it is sufficient to list the IN, INOUT, and VARIADIC arguments.

−

argname

+

;argname

−

The name of a function argument. Note that ALTER EXTENSION does not actually pay any attention to argument names, since only the argument data types are needed to determine the function's identity.

+

:The name of a function argument. Note that ALTER EXTENSION does not actually pay any attention to argument names, since only the argument data types are needed to determine the function's identity.

−

argtype

+

;argtype

−

The data type(s) of the function's arguments (optionally schema-qualified), if any.

描述

ALTER EXTENSION changes the definition of an installed extension. There are several subforms:

UPDATE

This form updates the extension to a newer version. The extension must supply a suitable update script (or series of scripts) that can modify the currently-installed version into the requested version.

SET SCHEMA

This form moves the extension's objects into another schema. The extension has to be relocatable for this command to succeed.

ADD member_object

This form adds an existing object to the extension. This is mainly useful in extension update scripts. The object will subsequently be treated as a member of the extension; notably, it can only be dropped by dropping the extension.

DROP member_object

This form removes a member object from the extension. This is mainly useful in extension update scripts. The object is not dropped, only disassociated from the extension.

See Section 35.15 for more information about these operations.

You must own the extension to use ALTER EXTENSION. The ADD/DROP forms require ownership of the added/dropped object as well.

参数

extension_name

The name of an installed extension.

new_version

The desired new version of the extension. This can be written as either an identifier or a string literal. If not specified, ALTER EXTENSION UPDATE attempts to update to whatever is shown as the default version in the extension's control file.

new_schema

The new schema for the extension.

object_name

agg_name

function_name

operator_name

The name of an object to be added to or removed from the extension. Names of tables, aggregates, domains, foreign tables, functions, operators, operator classes, operator families, sequences, text search objects, types, and views can be schema-qualified.

agg_type

An input data type on which the aggregate function operates. To reference a zero-argument aggregate function, write * in place of the list of input data types.

source_type

The name of the source data type of the cast.

target_type

The name of the target data type of the cast.

argmode

The mode of a function argument: IN, OUT, INOUT, or VARIADIC. If omitted, the default is IN. Note that ALTER EXTENSION does not actually pay any attention to OUT arguments, since only the input arguments are needed to determine the function's identity. So it is sufficient to list the IN, INOUT, and VARIADIC arguments.

argname

The name of a function argument. Note that ALTER EXTENSION does not actually pay any attention to argument names, since only the argument data types are needed to determine the function's identity.

argtype

The data type(s) of the function's arguments (optionally schema-qualified), if any.

left_type

right_type

The data type(s) of the operator's arguments (optionally schema-qualified). Write NONE for the missing argument of a prefix or postfix operator.